NTSB Identification: BFO92LA100.
The docket is stored on NTSB microfiche number 46852.
Accident occurred Sunday, July 12, 1992 in BEAVERTOWN, PA
Probable Cause Approval Date: 06/30/1993
Aircraft: PIPER PA-22-108, registration: N4754Z
Injuries: 2 Serious.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PILOT WAS NEARING HIS DESTINATION WHEN HE NOTICED THE SKY WAS DARKENING NORTH OF THE AIRPORT. THE PILOT DECIDED TO TURN AROUND AND HEAD BACK TO WHERE HE DEPARTED. HE SAID THAT AFTERWARDS HE ENCOUNTERED A DOWNDRAFT AND HE WAS UNABLE TO MAINTAIN ALTITUDE. CONSEQUENTLY, THE AIRCRAFT DESCENDED AND STRUCK THE EAST SIDE OF A MOUNTAIN.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE PILOT'S FAILURE TO MAINTAIN GROUND CLEARANCE. CONTRIBUTING TO THE ACCIDENT WAS A DOWNDRAFT AND INSUFFICIENT ALTITUDE.

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